make plural s lowercase
diff --git a/Doc/library/xmlrpclib.rst b/Doc/library/xmlrpclib.rst
index 766a796..720da39 100644
--- a/Doc/library/xmlrpclib.rst
+++ b/Doc/library/xmlrpclib.rst
@@ -36,7 +36,7 @@
 
 .. warning::
 
-   In the case of https URIS, :mod:`xmlrpclib` does not do any verification of
+   In the case of https URIs, :mod:`xmlrpclib` does not do any verification of
    the server's certificate.